JPS6337297B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present application relates to an improvement in the two-panel roof ventilation system that is the subject of Japanese Patent Application Laid-Open No. 52-70558.

This invention relates to a novel ventilation system. In particular, the present invention relates to a one-piece metal ventilation system, which system is particularly suitable for use in connection with the roofs of various buildings.

Conventionally, roof-mountable metal ventilation devices have been used for various types of ventilation.

As is well known, if a building is warm and it is cold outside and there is sufficient moisture, the moisture will condense on the cold surfaces of the building. This phenomenon is usually most noticeable in the case of roofs. Condensed moisture or water droplets are
It is necessary to prevent such shrinkage as it will rot the wood or other roofing materials. This is done by ensuring adequate ventilation of all areas of the building where condensation is likely to occur.

Even on roofs where vapor barriers are used, condensation still occurs, so all roofs behind the insulation must be fully ventilated. This can be partially achieved by channeling air between the roof decks, under the roofing, and behind the insulation. One of the more important needs of roof ventilation is to prevent the formation of condensation in the space between the inside of the roof and the top of the insulation layer, which reduces the energy used to heat and cool the enclosed space. Based on the need to preserve.

Condensation and water droplets can cause some types of insulation to rot and lose their insulation properties. In other words, when the insulating material is inert to water, the insulating material easily conducts thermal energy due to the infiltration of water droplets.

In addition to the moisture condensation problem mentioned above, there is of course the basic ventilation problem of bringing fresh air into a room and at the same time removing polluted air from it. In order to feel comfortable,
Air is required to be free of dust, smoke, and odors. Furthermore, the air temperature should not be too high or too low, and an appropriate amount of humidity is also necessary.

The more people there are in a room, and the more people work, the faster the air gets polluted. Dirty air must be removed and replaced with fresh air. If the air outside is fresh, just open the window and turn on the fan to exchange the air in the room. Of course, this is not possible if the room is inside a building, or if the room or space being ventilated is in an attic or other such small space.

The amount of air required for adequate ventilation varies depending on the room and the number of people occupying it. Under normal conditions,
For each person in the room, 0.3 to 0.8 m ³ of fresh air must be supplied every minute.

Known types of ventilation devices, such as those mentioned above, also serve to remove harmful substances from the air. In addition to applications associated with commercial buildings, such ventilation systems can also be used in mines, tunnels, factories, etc. In areas such as mines and tunnels, toxic gases may be present and must be removed to allow safe work. Factories can also utilize such ventilation systems to remove toxic gases produced during industrial processes.

One of the disadvantages of conventional ventilation systems is that they are relatively expensive to manufacture, requiring at least two to four individual parts that require a relatively complex manufacturing process to create a desirable ventilation system. That is the point. Furthermore, such ventilation systems lack durability and robustness, are susceptible to degradation when exposed to outside air, and require a somewhat complex and interwoven process.

One prior art to this application is US Pat. No. 3,593,478, issued in 1971 to Mr. Mason. This discloses a three-panel ventilation system. Other prior art is U.S. Patent Nos. 3,079,853, 3,311,047;
No. 4000688. These technologies include ventilation systems that have gaps between the shingles at the top of the roof and extend along the ridge of the roof that is constructed in a non-traditional manner. Additionally, U.S. Patent No.
No. 3238862 discloses a six-bladed roof ventilation system. The device includes a molded rectangular base plate of plastic with a central flange, a molded plastic cover, and a metal armor plate.
It has three rivets, which are used to attach the cover to the board and entrap the metal plate.

The problems, drawbacks, and complexities described above are eliminated or greatly reduced by the present invention.

The present invention includes a first substantially horizontal and substantially flat annular portion, a substantially vertical hollow portion concentric with the annular portion,
A ventilation device is provided which is formed from a cap portion coaxial with the vertical portion and a portion including a vent that slopes downwardly and outwardly from the hollow tubular portion to the cap portion. The four identification portions of the device are formed by a continuous, plastically deformed sheet of material.

The main object of the invention is to provide an integrated metal ventilation device formed from only one metal plate.

Another object of the invention is to provide a ventilation device that is more durable, less expensive to produce, and easier to manufacture than previous devices.

Before describing the present invention in detail, it should be noted that the application of the present invention is not limited to the details of the structure and form of the embodiments shown in the accompanying drawings. This is because other embodiments of the present invention are possible.
This is because it can be carried out or carried out in various ways and using various materials. Furthermore, the language used herein is for purposes of explanation and illustration only and is not intended to be limiting.

The drawings, particularly FIG. 1, will be explained.
In the figure, a ventilation device 1 according to the invention is shown. In Figure 1, the generally flat annular base 2 of the device is positioned adjacent to the roof and covered with fiber gel membrane and asphalt, but it could also be covered with other roofing materials or flashing materials. be.

In FIG. 1, a generally cylindrical portion 3 is integral with the base 2 and constitutes approximately one-third of the total height of the device in the illustrated embodiment. Furthermore, part 3 is integrally connected via an arcuate intermediate part 4 with a frustoconical part 5, these parts 3, 4, 5 forming a tubular part as a whole. Although not required to practice the invention, it is preferred that the lower portion 3 of the tubular portion be cylindrical, as shown, rather than tapered as portion 5.

Referring to FIG. 2, there is a bent portion 6 between the portion 11 and the truncated conical portion 5. Portion 11 is provided with a plurality of ventilation holes. Further, the portion 11 is arranged to extend outward and downward from the bent portion 6, thereby forming an annular space between the portion 11 and the upper outer surface of the portion 5, and the space and the portion 5 are approximately concentric. will be placed in Although this is not always the case, it is preferable that the ventilation hole 7 be located as close to the bent portion 8 as possible. In this way, the amount of condensate that collects on the inner curved portion of the folded portion 8 can be minimized. Furthermore, the ventilation hole 7 may be provided in the section 5 rather than the section 11. However, in that case, condensate will drip into the ventilation space.

Of course, the bend 8 could also be provided with drainage holes, but in that case the manufacturing advantages of the illustrated embodiment would be reduced and no significant practical advantages would result therefrom. This is because even if condensate collects, a small amount will quickly evaporate.

A horizontal, generally flat top 10 and arcuate sides 9 form a cap-like structure over the top of the vertical frustoconical section 5. The side parts 9 and the top part 10 of these caps are formed approximately concentrically with the base part 2, the generally cylindrical part 3, the intermediate part 4 and the frustoconical part 5.

According to a practical preferred embodiment, the ventilator 1 is 1.2
Made from an aluminum alloy known as 3003, which contains % Mn. The alloy was also immersed in corrosive acid.

A significant feature of the present invention is that the entire ventilation system is formed from a single circular piece of metal, providing a strong structure and eliminating the need for fasteners that can corrode or loosen over time; The point is that there are no joints between dissimilar metals that would cause galvanic corrosion.

Although the number of ventilation holes 7 provided in the portion 11 may be arbitrary, it has been found from some embodiments of the present invention that eight is preferred.

In one practical embodiment of the present invention, a circular aluminum blank is turned on a lathe, and a first die having the approximate shape of section 5 of the embodiment is used to create a center part of the blank. Forms a generally cylindrical portion.

Using a second die having the general shape of sections 3, 4, 5 in the example, sections 3, 4, 5 are formed and grooves are formed in the folds 6. Further, adjacent to this bent portion 6, a ventilation hole 7 is made. The workpiece is then pressed and a cap section is formed by folding the workpiece around the bend 6 using a die similar in shape to sections 9 and 10 in the example. Similar structures can also be created using deep drawing stamping techniques.
Obtainable.

It will be appreciated that the invention may be manufactured by various methods, with various types of machines, and with various materials without departing from the spirit of the invention as set forth in the appended claims. It is possible.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of an embodiment of the present invention, and FIG. 2 is an enlarged view showing the cap portion of the embodiment of the present invention shown in FIG. 2... Base, 3... Approximately cylindrical part, 4... Arc-shaped middle part, 5... truncated conical part, 6... Bent part, 7... Ventilation hole, 8... Bent part, 10...Top.

Claims (1)

[Scope of Claims] 1. A substantially horizontal and flat annular base, a tubular portion extending upward from the base, and a first bent portion bent outward and downward from the upper end of the tubular portion; a ventilation hole portion extending downward from the first bent portion; a second bent portion bent upward from the ventilation hole portion; and an arc-shaped cap side portion extending upward from the second bent portion. and,
A top part of the cap extends substantially horizontally above the side part of the cap, and a plurality of ventilation holes are formed in the ventilation hole part, and the entire part is integrally formed from a single metal plate. A single-piece ventilation system featuring: 2. The single-piece ventilation device according to claim 1, wherein the tubular portion is formed by integrally connecting a lower substantially cylindrical portion and an upper truncated conical portion via an arcuate intermediate portion. 3. A single-piece ventilation device according to claim 2, wherein said generally cylindrical portion occupies about one-third of the total height of said device. 4. The single-piece ventilation device according to claim 2, wherein an annular space is formed between the ventilation hole portion and the upper outer surface of the truncated conical portion. 5. The base portion, the substantially cylindrical portion, the intermediate portion, the truncated conical portion, the cap side portion, and the cap top portion are all formed approximately concentrically. Single-piece ventilation system. 6. The one-piece ventilation device according to claim 1, wherein the ventilation hole is disposed near the second bent portion. 7. The single-piece ventilation device according to claim 1, wherein the metal plate is made of aluminum. 8. The one-piece ventilation device according to claim 1, wherein the metal plate is an aluminum alloy.